http://kotaku.com/5039426/playstation-3-controller-getting-wireless-keypad i smiled and laughted when i saw that thing. with this thing, the ps3 now has more buttons then any other console for it's controller, possibly a true hardcore system. with this thing and what the ps3 graphics can do, you can make a flight simulator, as flight simulators are often known to have plenty of functions and hotkeys.
MMOs have a lot more than flight simulators. You do have a point though, flight simulators are one of the most neglected genres on consoles.
You can also buy a keyboard which works with the PS3, if you're used to PC gaming, looks nice though, but would never use it properly.